PhET/C2/Energy-Skate-park/English-timed - Revision history

Sandhya.np14 at 10:49, 11 August 2018

2018-08-11T10:49:17Z

Sandhya.np14 at 07:42, 11 August 2018

2018-08-11T07:42:23Z

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Madhurig at 11:50, 9 August 2018

2018-08-09T11:50:36Z

Madhurig at 11:35, 8 August 2018

2018-08-08T11:35:27Z

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PoojaMoolya: Created page with "{|border=1 ||'''Time''' ||'''Narration''' |- || 00:01 || Welcome to this tutorial on '''Energy Skate Park simulation'''. |- ||00:06 || In this tutorial We will, Demonstra..."

2018-07-31T09:51:49Z

Created page with "{|border=1 ||'''Time''' ||'''Narration''' |- || 00:01 || Welcome to this tutorial on '''Energy Skate Park simulation'''. |- ||00:06 || In this tutorial We will, Demonstra..."

New page

{|border=1
||'''Time'''
||'''Narration'''

|-
|| 00:01
|| Welcome to this tutorial on '''Energy Skate Park simulation'''.

|-
||00:06
|| In this tutorial We will, Demonstrate '''Energy Skate Park''', '''PhET simulation'''.

|-
||00:14
|| Here I am using- Ubuntu Linux OS version 14.04

|-
||00:22
||Java version 1.7.0

|-
||00:26
||Firefox Web Browser version 53.02.2

|-
||00:32
|| To follow this tutorial, Learner should be familiar with topics in high school Physics.

|-
|| 00:40
|| Using this '''simulation''' we will learn, About law of conservation of energy.

|-
||00:48
||To show '''Pie Chart''' and '''Bar Graphs''' for energy changes.

|-
||00:53
||To use '''Energy vs Position''' graph to show the energy value at a particular position.

|-
||01:00
||To change '''Location''' and observe the energy changes.

|-
||01:04
||About change in energy due to change in '''Mass''' and '''Friction'''.

|-
||01:09
|| According to '''law of conservation of energy''', Energy can neither be created nor destroyed.

|-
||01:17
||It can only be converted from one form to another.

|-
||01:22
||The total energy before and after the transformation is conserved.

|-
|| 01:27
||'''Potential energy''' is the energy possessed by an object by virtue of its position.

|-
||01:34
||'''PE = mgh ''' where, m is mass of object , g is acceleration due to gravity and h is height

|-
||01:43
||'''Kinetic energy''' is the energy possessed by a body due to its motion.

|-
||01:49
||'''KE =1/2 mv<sup>2</sup> '''

where, m is mass of object and v is velocity

|-
|| 01:57
|| Let us start the demonstration.

|-
|| 02:00
|| Use the given link to download the '''simulation'''.

|-
|| 02:04
|| I have already downloaded, '''Energy skate park simulation '''to my '''Downloads '''folder.

|-
|| 02:11
|| To run the '''simulation''', open the terminal.

|-
||02:15
||At the prompt type '''cd Downloads''' and press '''Enter'''.

|-
|| 02:23
|| Then type, '''java space hyphen jar space energy hyphen skate hyphen park underscore en dot jar''' and press '''Enter'''.

|-
||02:37
||'''Energy Skate Park simulation''' opens.

|-
|| 02:41
|| This is the interface of '''Energy skate Park simulation'''.

|-
|| 02:46
|| Using this '''simulation''', let's see how energy transformations happen in real world applications.

|-
|| 02:54
|| Screen has a menu bar with menu items- '''File'''

|-
||03:00
||'''Tracks'''

|-
||03:02
||'''Help'''

|-
|| 03:04
|| Screen has a '''PhET skater''' oscillating in a default loop.

|-
||03:09
||To change the track of the '''skater''', click on '''Tracks''' menu.

|-
||03:14
||Menu shows a list of '''tracks''' to choose.

|-
|| 03:19
|| On the right side, there is a panel with controls.

|-
||03:24
||These controls are used to, change the attributes in the '''simulation'''.

|-
|| 03:29
|| Click on '''Reset''' to reset the simulation. Click on '''Yes''' to confirm the reset.
|-
|| 03:37
|| Click on '''Choose Skater''' button on the panel.

|-
||03:41
||'''Choose Skater''' panel opens.

|-
|| 03:44
|| This panel shows different '''skaters''' along with their mass.

|-
||03:49
||By default '''PhET Skater''' with '''75 kg mass''' is selected.

|-
||03:55
||Click on '''Ok''' button.

|-
|| 03:58
|| At the bottom of the screen we have, '''Sim Speed''' slider to control the speed of the animation.

|-
||04:06
||'''Play/Pause''' and '''Step''' buttons.

|-
||04:10
||'''Zoom in''' and '''zoom out''' buttons.

|-
|| 04:13
|| By default '''Sim Speed''' slider is on '''fast'''.

|-
||04:17
||Drag the''' Sim speed''' slider between '''slow '''and '''fast'''.

|-
|| 04:22
|| To show the path, click on '''Show Path''' button in '''Path''' section.

|-
||04:27
||Observe the purple dots on the track.

|-
||04:30
||Click on '''Stop''' button and then pause the '''simulation'''.

|-
|| 04:36
|| Click on any purple dot on the track.

|-
||04:40
||The following information will be displayed:

|-
||04:44
||'''Kinetic energy'''

|-
||04:46
||'''Potential energy'''

|-
||04:48
||'''Total energy'''

|-
||04:50
||'''Height'''

|-
||04:52
||'''Speed''' of skater.

|-
||04:54
|| Click on '''Clear''' button to clear the path.

|-
|| 04:58
|| Now click on '''Play''' button to play the '''simulation'''.

|-
|| 05:02
|| On the right side panel under '''Energy Graphs''' section, click '''Show Pie Chart''' checkbox.

|-
|| 05:09
|| Observe that '''with Thermal''' checkbox also gets selected.

|-
||05:14
||'''Pie chart''' shows conversion of '''Kinetic energy''' to '''Potential energy''' and vice-versa.

|-
|| 05:20
|| Energy indicator box is shown on the top right corner of the screen.

|-
||05:26
||This box helps to identify the energy changes in the '''Pie Chart'''.
|-
|| 05:31
|| In this case '''potential energy''' is '''gravitational potential energy'''.

|-
||05:36
||It is due to change in height of the '''skater''' in the gravitational field.

|-
|| 05:41
|| As the '''skater''' moves downwards, his '''Potential energy''' decreases and '''Kinetic energy''' increases.

|-
|| 05:49
|| As '''skater''' moves upwards his '''Potential energy''' increases and '''Kinetic energy''' decreases.

|-
|| 05:56
|| Drag the '''sim speed''' slider towards '''Slow'''.

|-
|| 06:00
|| You can still see a small amount of '''Potential energy''' at the bottom of the track.

|-
||06:06
||This is because track is at a height above the ground level.

|-
|| 06:11
|| Drag the track to the ground level.

|-
||06:15
||Observe that '''skater''' has zero '''Potential energy''' at the bottom of the track and zero '''kinetic energy''' at the top.

|-
|| 06:23
|| Now I will drag the track above the ground level.

|-
||06:27
||Click on '''Potential Energy Reference''' checkbox.

|-
||06:31
||'''P.E=0 at this dotted line''' will display at the bottom of the screen.
|-
|| 06:37
|| Drag '''Potential Energy Reference''' line upwards to touch the bottom of the track.

|-
||06:43
||Observe that now '''skater''' has zero '''Potential energy''' at the bottom of the track.

|-
|| 06:49
|| Next, click on '''Bar Graph''' button.

|-
||06:52
||A '''Bar graph''' with four energies is shown.

|-
||06:56
||Note the energy changes as the '''skater''' moves back and forth on the track.
|-
|| 07:02
|| Here '''Total energy''' of the '''skater''' remains constant.

|-
||07:06
||Therefore it obeys the law of conservation of energy.
|-
|| 07:10
|| Let us change the shape and height of the track.

|-
||07:14
||Click on any blue point and drag.

|-
||07:17
||Note the increase in '''Total''' energy with an increase in height of the track.

|-
||07:22
||Close the '''Bar Graph'''.
|-
|| 07:24
|| Click on '''Reset''' button to reset the '''simulation'''.

|-
|| 07:29
|| Next click on '''Energy vs. Position''' button.

|-
||07:33
||'''Energy vs Position ''' graph will display.
|-
||07:37
|| Drag the track to the left side to view the graph and '''skater''' simultaneously.

|-
|| 07:43
|| Notice the energy changes with respect to position of '''skater'''.

|-
||07:48
||Here you can see a moving dotted line.

|-
||07:52
||It represents, energy of the '''skater''' at a particular position on the track.
|-
||07:58
|| Graph has four energy check-boxes at the bottom.

|-
||08:02
||To view the graph of any specific energy, uncheck remaining check boxes.

|-
||08:09
||Click on '''Pause''' button to pause the '''simulation'''.
|-
|| 08:13
|| Click on '''Copy''' button.

|-
||08:16
||'''Copy''' button helps to show the energy values at particular position on the graph.

|-
||08:22
||Close the graphs.

|-
|| 08:25
|| Now click on '''Energy vs. Time''' button.

|-
||08:29
||'''Energy vs. Time''' graph opens.

|-
|| 08:33
|| At the bottom of the graph we have- '''Sim Speed''' slider,

|-
||08:38
||'''Stop'''/'''Go''', '''Playback''',
|-
||08:42
||'''Step''', '''Rewind''' and '''Clear''' buttons.

|-
||08:49
|| Click on '''Play''' button to play the '''simulation'''.

|-
|| 08:56
|| Click on '''Stop''' button.

|-
|| 08:59
|| Lets drag the '''sim speed''' slider between '''slow''' and '''fast'''.

|-
||09:04
||Then click on '''Playback''' button.

|-
||09:07
|| Notice a violet vertical line moving across the path.

|-
||09:12
||Note the '''kinetic''', '''Potential''' and '''Total energy''' values at a given time.

|-
||09:20
|| Note that '''Total energy''' remains constant.

|-
||09:24
||But, '''Kinetic energy''' changes to '''Potential energy''' and vice-versa.

|-
||09:29
||Here '''Thermal energy''' is zero as there is no friction.

|-
||09:33
||Close the '''Energy vs. Time''' graph.

|-
|| 09:36
|| Click on '''Reset''' button to reset the '''simulation'''.

|-
|| 09:40
|| Let us see how mass of the '''skater''' will affect the '''total energy'''.

|-
||09:45
||Scroll to the bottom of the panel.

|-
|| 09:48
|| Click on '''Edit skater''' button.

|-
||09:51
||Scroll down to see '''Mass''' text-box and '''Mass''' Slider.

|-
||09:57
||By default '''Mass''' is '''75 kg'''.

|-
|| 10:01
|| Click on '''Energy Vs. Time''' button to open the graph.

|-
|| 10:06
|| Drag the '''Mass''' slider gradually towards '''200'''.

|-
||10:10
||Observe the change in energy as we change the skater's mass in the graph.

|-
|| 10:16
|| Close the '''Energy Vs. Time''' graph.

|-
|| 10:19
|| Now we will take the '''skater''' to different planets.

|-
|| 10:24
|| Scroll up the panel.

|-
||10:27
||Click on '''Reset''' button to reset the '''simulation'''.

|-
||10:31
||In the '''Location''' section, by default '''Earth''' is selected.

|-
||10:35
||Click on '''Energy vs. Time''' button.
|-
||10:39
|| Under '''Location''' section, click on '''Moon''' radio-button.

|-
||10:44
||Observe that '''Skater''' flies off beacause '''moon''' has low '''Gravity''' value.
|-
|| 10:50
|| Click on '''Return Skater''' button.

|-
|| 10:53
|| Here '''Gravity''' value is '''1.62 N/kg''' which is less than that of '''Earth'''.

|-
||11:00
||This results in decrease in the speed of '''skater'''.

|-
||11:04
||Here '''Total energy''' decreases as gravity on '''Moon''' is less than that of '''Earth'''.

|-
||11:10
|| Similarly explore '''Jupiter''' and '''Space''' locations and compare the energy changes.

|-
||11:17
||Close the '''Energy vs. Time''' graph.

|-
|| 11:21
|| Let us study the energy distribution for tracks with and without '''Friction'''.

|-
|| 11:26
|| Click on '''Reset''' button to reset the '''simulation'''.

|-
|| 11:30
|| Scroll down to panel and click on '''Track Friction''' button.

|-
||11:35
||Scroll down to see '''Coefficient of Friction''' slider.

|-
||11:40
||Click on '''Energy vs.Time''' button.
|-
|| 11:44
|| Drag the '''Coefficient of Friction''' slider gradually from '''None''' to''' Lots'''.

|-
||11:50
||Observe the energy changes.

|-
||11:53
||Here part of energy is converted to '''Thermal''' energy due to Friction.

|-
||11:59
|| This is due to the resistance in motion caused by '''Friction'''.

|-
||12:04
||'''Friction''' opposes the motion of the '''skater'''.

|-
||12:08
||It causes him to lose energy and slow down.

|-
||12:12
||Close the '''Energy vs. Time''' graph.

|-
|| 12:15
|| As an assignment, Select '''Double Well''' track from '''Tracks''' menu and observe the energy changes.

|-
||12:24
||Compare the energy changes in '''Double well''' track with '''Double Well Roller Coaster''' Mode.

|-
||12:30
||Find the changes in the '''thermal''' energy .

|-
||12:34
||And give an explanation. (Hint-Right click on the '''Track''' and select '''Roller Coaster Mode''')

|-
|| 12:43
|| Using '''Tracks''' box, Create tracks and observe the change in energies.

|-
|| 12:49
|| Let us summarise.

|-
||12:52
|| In this tutorial we have demonstrated, How to use '''Energy Skate Park''', '''PhET simulation'''.

|-
|| 13:01
|| Using this '''simulation''' we have learnt, About law of conservation of energy.

|-
||13:08
||To show '''Pie chart''' and '''Bar Graphs''' for energy changes.

|-
||13:13
||To use '''Energy vs Position''' graph to show the energy value at a particular position.

|-
||13:20
||To change '''Location''' and observe the energy changes.

|-
||13:24
||About change in energy due to change in '''Mass''' and '''Friction'''.

|-
|| 13:29
|| The video at the following link summarizes the Spoken Tutorial project.

Please download and watch it.

|-
|| 13:38
|| The '''Spoken Tutorial Project''' team: conducts workshops using spoken tutorials and

gives certificates on passing online tests.

|-
||13:47
||For more details, please write to us.

|-
|| 13:51
|| Please post your timed queries on this forum.

|-
|| 13:55
|| This project is partially funded by Pandit Madan Mohan Malaviya National Mission on Teachers and Teaching.

|-
||14:03
|| Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India.

|-
||14:11
||More information on this mission is available at this link.

|-
|| 14:16
|| This is Meenal Ghoderao from IIT-Bombay.

Thank you for joining

|}

@@ Line 359: / Line 359: @@
 |-
 ||07:37
-|| Drag the track to the left side to view the graph and '''skater''' simultaneously.
+|| Drag the '''track''' to the left side to view the graph and '''skater''' simultaneously.
 |-
@@ Line 371: / Line 371: @@
 |-
 ||07:52
-||It represents, energy of the '''skater''' at a particular position on the track.
+||It represents energy of the '''skater''' at a particular position on the track.
 |-
 ||07:58
@@ Line 405: / Line 405: @@
 |-
 || 08:33
-|| At the bottom of the graph we have- '''Sim Speed''' slider,
+|| At the bottom of the graph, we have- '''Sim Speed''' slider,
 |-
@@ Line 476: / Line 476: @@
 |-
 ||09:57
-||By default '''Mass''' is 75 kg.
+||By default, '''Mass''' is 75 kg.
 |-
@@ Line 508: / Line 508: @@
 |-
 ||10:31
-||In the '''Location''' section, by default '''Earth''' is selected.
+||In the '''Location''' section, by default, '''Earth''' is selected.
 |-
@@ Line 519: / Line 519: @@
 |-
 ||10:44
-||Observe that '''Skater''' flies off because '''moon''' has low '''Gravity''' value.
+||Observe that '''Skater''' flies off because moon has low '''Gravity''' value.
 |-
 || 10:50
@@ Line 534: / Line 534: @@
 |-
 ||11:04
-||Here '''Total energy''' decreases as gravity on '''Moon''' is less than that of '''Earth'''.
+||Here, '''Total energy''' decreases as gravity on Moon is less than that of Earth.
 |-
 ||11:10
-|| Similarly explore '''Jupiter''' and '''Space''' locations and compare the energy changes.
+|| Similarly, explore '''Jupiter''' and '''Space''' locations and compare the energy changes.
 |-
@@ Line 554: / Line 554: @@
 |-
 || 11:30
-|| Scroll down to panel and click on '''Track Friction''' button.
+|| Scroll down to '''panel''' and click on '''Track Friction''' button.
 |-
@@ Line 573: / Line 573: @@
 |-
 ||11:53
-||Here part of energy is converted to '''Thermal''' energy due to friction.
+||Here, part of energy is converted to '''Thermal''' energy due to friction.
 |-
@@ Line 593: / Line 593: @@
 |-
 || 12:15
-|| As an assignment,
+|| As an assignment:
 Select '''Double Well''' track from '''Tracks''' menu and observe the energy changes.
@@ Line 603: / Line 603: @@
 |-
 ||12:30
-||Find the changes in the thermal energy.
+||Find the changes in the thermal energy
 |-
 ||12:34
-||And give an explanation. (Hint-Right click on the '''Track''' and select '''Roller Coaster Mode''')
+||and give an explanation. (Hint-Right click on the '''Track''' and select '''Roller Coaster Mode''').
 |-
@@ Line 619: / Line 619: @@
 |-
 ||12:52
-|| In this tutorial we have demonstrated, How to use '''Energy Skate Park''', '''PhET simulation'''.
+|| In this tutorial, we have demonstrated, How to use '''Energy Skate Park''', '''PhET simulation'''.
 |-
@@ Line 629: / Line 629: @@
 |-
 ||13:08
-||2.To show pie chart and bar graphs for energy changes.
+||2. To show pie chart and bar graphs for energy changes.
 |-
@@ Line 645: / Line 645: @@
 |-
 || 13:29
-|| The video at the following link summarizes the Spoken Tutorial project.
+|| The video at the following link summarizes the '''Spoken Tutorial''' project.
 Please download and watch it.
@@ Line 651: / Line 651: @@
 |-
 || 13:38
-|| The Spoken Tutorial Project team: conducts workshops using spoken tutorials and
+|| The '''Spoken Tutorial''' Project team conducts workshops using spoken tutorials and
 gives certificates on passing online tests.
@@ Line 669: / Line 669: @@
 |-
 ||14:03
-|| Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India.
+|| Spoken Tutorial Project is funded by '''NMEICT, MHRD,''' Government of India.
 |-
@@ Line 679: / Line 679: @@
 || This is Meenal Ghoderao from IIT-Bombay.
-Thank you for joining
+Thank you for joining.
 |-
 |}

@@ Line 11: / Line 11: @@
 || In this tutorial We will,
-* Demonstrate '''Energy Skate Park''', '''PhET simulation'''.
+Demonstrate '''Energy Skate Park''', '''PhET simulation'''.
 |-
@@ Line 252: / Line 252: @@
 |-
 ||05:14
-||'''Pie chart''' shows conversion of Kinetic energy to Potential energy and vice-versa.
+||'''Pie chart''' shows conversion of kinetic energy to potential energy and vice-versa.
 |-
@@ Line 548: / Line 548: @@
 |-
 || 11:21
-|| Let us study the energy distribution for tracks with and without '''Friction'''.
+|| Let us study the energy distribution for tracks with and without friction.
 |-
@@ Line 575: / Line 575: @@
 |-
 ||11:53
-||Here part of energy is converted to '''Thermal''' energy due to Friction.
+||Here part of energy is converted to '''Thermal''' energy due to friction.
 |-
 ||11:59
-|| This is due to the resistance in motion caused by '''Friction'''.
+|| This is due to the resistance in motion caused by friction.
 |-
 ||12:04
-||'''Friction''' opposes the motion of the '''skater'''.
+||Friction opposes the motion of the '''skater'''.
 |-
@@ Line 595: / Line 595: @@
 |-
 || 12:15
-|| As an assignment, Select '''Double Well''' track from '''Tracks''' menu and observe the energy changes.
+|| As an assignment,
 |-
@@ Line 603: / Line 605: @@
 |-
 ||12:30
-||Find the changes in the '''thermal''' energy .
+||Find the changes in the thermal energy.
 |-
@@ Line 611: / Line 613: @@
 |-
 || 12:43
-|| Using '''Tracks''' box, Create tracks and observe the change in energies.
+|| Using '''Tracks''' box, create tracks and observe the change in energies.
 |-